It's got a great cast, sure. It's got good lessons about never giving up and striving for what you want, sure. But it really isn't that good of a movie. They should have done better. The plot is weak, too many things were piled on, and it really wasn't that funny; yeah, it had good comedic moments, but it wasn't THAT funny overall.
Kev and Tiff are two of my favourite comics; this movie did them no justice. Really hope they do better on future projects